Details
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Bug
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Status: Closed (View Workflow)
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Trivial
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Resolution: Fixed
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10.2, 10.3, 10.4, 10.5, 10.6, 10.7
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None
Description
--source include/have_innodb.inc
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CREATE TABLE t1 ( |
a INT, b INT, KEY(b), |
CONSTRAINT FOREIGN KEY (a) REFERENCES t1 (b) ON DELETE CASCADE |
) ENGINE=InnoDB;
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INSERT INTO t1 (a,b) VALUES |
(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),
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(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,1),(1,0);
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--error ER_GET_ERRMSG
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DELETE FROM t1 WHERE b = 1; |
SHOW WARNINGS;
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DROP TABLE t1; |
The message returned to the query uses DICT_FK_MAX_RECURSIVE_LOAD (20):
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10.2 5d57e04b |
DELETE FROM t1 WHERE b = 1; |
ERROR HY000: Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB |
SHOW WARNINGS;
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Level Code Message |
Warning 152 InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 20. Please drop extra constraints and try again |
Error 1296 Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`b`) ON DELETE CASCADE' from InnoDB |
The message written in the error log uses FK_MAX_CASCADE_DEL (15):
2022-01-23 2:38:51 140072887355136 [ERROR] InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 15. Please drop excessive foreign constraints and try again
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The latter seems correct.